TY  - JOUR
AU  - Daniel R. Hughes
TI  - Extensions of designs and groups: projective, symplectic and certain affine groups.
JO  - Mathematische Zeitschrift
PY  - 1965
SP  - 199
EP  - 205
VL  - 89
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1965__89_170437/
ID  - MZ_1965__89_170437
ER  -